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FPSC MCQs

Federal Public Service Commission — Complete MCQ Bank

1,461 Questions
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FPSC recruitment tests assess subject knowledge, general ability and job-related competence for federal government positions across Pakistan.

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161
Biology Medium

Which vitamin is essential for the formation of collagen and acts as an antioxidant?

  • AVitamin A
  • BVitamin C
  • CVitamin D
  • DVitamin K
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Correct Answer: Option B — Vitamin C
Explanation: Vitamin C is essential for collagen synthesis acting as a cofactor for enzymes that stabilise the collagen triple helix and its deficiency causes scurvy.
Submitted by: PaperMCQs
162
Biology Medium

What is the term for proteins produced by B lymphocytes in response to specific antigens?

  • AAntigens
  • BEnzymes
  • CHormones
  • DAntibodies
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Correct Answer: Option D — Antibodies
Explanation: Antibodies also called immunoglobulins are Y-shaped proteins produced by B lymphocytes that specifically bind to antigens neutralising pathogens and marking them for destruction.
Submitted by: PaperMCQs
163
Biology Medium

What is the term for a substance that triggers an immune response in the body?

  • AAntibody
  • BEnzyme
  • CAntigen
  • DHormone
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Correct Answer: Option C — Antigen
Explanation: An antigen is any substance usually a protein on the surface of a pathogen that is recognised as foreign by the immune system and triggers the production of specific antibodies.
Submitted by: PaperMCQs
164
Biology Hard

Which type of white blood cell produces antibodies against specific pathogens?

  • ANeutrophils
  • BB lymphocytes
  • CMonocytes
  • DEosinophils
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Correct Answer: Option B — B lymphocytes
Explanation: B lymphocytes or B cells are white blood cells that produce specific antibodies when activated by an antigen providing targeted humoral immunity against pathogens.
Submitted by: PaperMCQs
165
Biology Medium

What is the process by which white blood cells engulf and digest bacteria and foreign particles?

  • APhagocytosis
  • BEndocytosis
  • COsmosis
  • DPinocytosis
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Correct Answer: Option A — Phagocytosis
Explanation: Phagocytosis is the process by which phagocytes such as neutrophils and macrophages engulf and digest bacteria foreign particles and dead cells protecting the body from infection.
Submitted by: PaperMCQs
166
Biology Medium

Which type of immunity is present from birth and provides a non-specific first line of defence?

  • AAcquired immunity
  • BActive immunity
  • CPassive immunity
  • DInnate immunity
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Correct Answer: Option D — Innate immunity
Explanation: Innate immunity is the non-specific immune response present from birth providing the first line of defence through physical barriers inflammation and phagocytes against all pathogens.
Submitted by: PaperMCQs
167
Biology Medium

What is the term for the symbiotic relationship where one organism benefits and the other is neither helped nor harmed?

  • AMutualism
  • BParasitism
  • CAmensalism
  • DCommensalism
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Correct Answer: Option D — Commensalism
Explanation: Commensalism is a symbiotic relationship where one organism benefits while the other is neither harmed nor helped such as barnacles attaching to whales for transport.
Submitted by: PaperMCQs
168
Biology Medium

What is the term for the symbiotic relationship where one organism benefits and the other is harmed?

  • AMutualism
  • BCommensalism
  • CAmensalism
  • DParasitism
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Correct Answer: Option D — Parasitism
Explanation: Parasitism is a symbiotic relationship where one organism the parasite benefits at the expense of the other the host causing it harm such as tapeworms in the intestines.
Submitted by: PaperMCQs
169
Biology Medium

What is the term for the symbiotic relationship where both organisms benefit?

  • ACommensalism
  • BParasitism
  • CMutualism
  • DAmensalism
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Correct Answer: Option C — Mutualism
Explanation: Mutualism is a type of symbiotic relationship where both organisms involved benefit from their interaction such as the relationship between bees and flowers.
Submitted by: PaperMCQs
170
Biology Medium

Which branch of biology deals with the study of viruses?

  • ABacteriology
  • BMycology
  • CParasitology
  • DVirology
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Correct Answer: Option D — Virology
Explanation: Virology is the branch of biology that studies viruses including their structure classification evolution mechanisms of infection and methods of control.
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